package ms.jasim.model.editor.actions;

import java.util.ArrayList;
import java.util.List;

import ms.jasim.framework.SolutionSimulator;
import ms.jasim.model.editor.views.SolutionSimulationView;
import ms.jasim.pddl.PddlSolution;
import ms.util.SimulationUtils;
import ms.utils.PerformanceTimer;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.IViewActionDelegate;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;

/**
 * Our sample action implements workbench action delegate.
 * The action proxy will be created by the workbench and
 * shown in the UI. When the user tries to use the action,
 * this delegate will be created and execution will be 
 * delegated to it.
 * @see IWorkbenchWindowActionDelegate
 */
public class SimulateSolutionAction implements IWorkbenchWindowActionDelegate, IViewActionDelegate {
	protected List<PddlSolution> solutions;
	/**
	 * The constructor.
	 */
	public SimulateSolutionAction() {
		solutions = new ArrayList<PddlSolution>();
	}

	/**
	 * The action has been activated. The argument of the
	 * method represents the 'real' action sitting
	 * in the workbench UI.
	 * @see IWorkbenchWindowActionDelegate#run
	 */
	public void run(IAction action) {
		PerformanceTimer.createEntry("SOL-SIMUL", "Simulate solution");
		
		List<SolutionSimulator> result = SimulationUtils.simulateSolutions(null, solutions);
		if (result != null) {
			SolutionSimulationView view =  (SolutionSimulationView) SimulationUtils.showView(SolutionSimulationView.ID);
			if (view != null)
				view.setInput(result);
		}
		PerformanceTimer.closeEntry();
		PerformanceTimer.dumpEntries();
	}

	/**
	 * Selection in the workbench has been changed. We 
	 * can change the state of the 'real' action here
	 * if we want, but this can only happen after 
	 * the delegate has been created.
	 * @see IWorkbenchWindowActionDelegate#selectionChanged
	 */
 	public void selectionChanged(IAction action, ISelection selection) {
		this.solutions.clear();
		if (selection instanceof StructuredSelection) {
			StructuredSelection sel = (StructuredSelection) selection;
			if (sel.size() > 0 && sel.getFirstElement() instanceof PddlSolution)
				this.solutions.addAll(sel.toList());
		}
		updateActionText(action);
		action.setEnabled(this.solutions.size() > 0);
	}

	protected void updateActionText(IAction action) {
		if (solutions.size() == 1)
			action.setText("Simulate " + solutions.get(0).getName());
		else 
			action.setText("Simulate");
	}

	/**
	 * We can use this method to dispose of any system
	 * resources we previously allocated.
	 * @see IWorkbenchWindowActionDelegate#dispose
	 */
	public void dispose() {
	}

	/**
	 * We will cache window object in order to
	 * be able to provide parent shell for the message dialog.
	 * @see IWorkbenchWindowActionDelegate#init
	 */
	public void init(IWorkbenchWindow window) {
	}

	
	@Override
	public void init(IViewPart view) {
		// TODO Auto-generated method stub
		
	}
}